Standing optical phonons in finite semiconductor superlattices studied by resonant Raman scattering in a double microcavity.

We report optical double resonant enhancement of Raman scattering in a new double microcavity geometry. The design allows almost backscattering geometries, providing easy access to the excitations' in-plane dispersion. The cavity is used to study the phonon spectra of a finite GaAs/AlAs superlattice.